Drain-trap.



G. J. DEHN.

DRAIN TRAP. I v

APPLICATION FILED FEB. 19. 1909' Patented Mar. 7, 1916.

2 SHEETS-SHEET I.

2 3 2 5 i 5 f: hi ram- 3 2 3; J "mm III THE COLUMBIA PLAY -IOGRAPH co.. WASHINGTON, u. c.

.DEHN

DRAIN TRAP. APPLICATION FlLED'F EB. 19. 1909.

Patented-Mai. 7,1916.

2 SHEETSSHEET 2 I'I/ I/l/Jky111011111/1 111111111111111 THE COLUMBIA PLANOGRAPH c0., WASHINGTON, D. c.

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DRAIN-TRAP.

Patented Mar. *7, 1916. Application filed. February 19, 1909. Serial No. 478,959.

1,1T4,234L Specification of Letters Patent.

of Fig.' 2. Fig. 4 is a perspective of the To all whom it may concern:

receptacle for collecting sediment passing Be it known that I, GEORGE J. DEHN, a-

' which will not resident of Chicago, in the county of Cools and State of Illinois, have invented certain new and useful Improvements 1n Drain- Traps, of which the following is afu ll,"

clear, and exact description;

The invention relates to drain-traps and designs to provide an improved drain-trap 7 1n which provlsion 1s made forpreventlng V back-flow of thewater through the outlet pipe and through the drain.

In back-water traps and drains it is customary to employ a check-valve whichpre-- vents back-flow of the water from the outlet. 1n practice it occurs that lint and whereby matter, such as lint, which is likely to become lodged on the valve-seat or valve or to clog the passage in the trap pipe will be trapped or held so that the back-water valve will not be rendered inoperative to prevent back-flow of water or gas through the check-valve.' By providing a removable sediment-holdingreceptacle in the basin of the drain to which the trap-pipe is connected in which matter, such as lint or other materiallikelyto prevent the, closing of the .valve will be deposited and caught 7 to prevent it from passing to the valve, the

accumulation may be occasionally removed when necessary. p

The invention further designs to provide an improved drain-trap which may be employed either as a floor-drain or connected to receive drain in drain outlets such as lavatories, or rinsingkbasins or the like.

The invention still further designs to improve the construction of drain-traps so that they will contain a large body of water,

used. V

WVith these objectsjin view, the invention consists in the several novel features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Figurel is a side elevation of adrain-trap embodying the invention. Fig. 2 is a vertical longitudinal. section. Fig. 3is a section taken on-l1ne 33 ing to the sewer.

evaporate if not frequently to the drain. lfig. 5 isa section taken on l1ne o5 of Fig. 2. in 6 is a section showing the drain in use asa floor-drain.

The improved drain comprises a basin 1O formed with a" cylindrical body 11, and a bottom .18. This basin isadapted to receive the drain and "to contain a body of water sui'licient to constitute an effective waterseal to prevent back-flow of gases from the sewer-pipe. A trap -pipe 14:, integrally formed -with the basin, communicates with .the lower portion of the basin as at 15, and

extends upwardly toahorizontally eXtending outlet pipe 16 which, is also integrally formed with the basin and trap-pipel. At

the confluence of the trap pipe 14 and the pass to the outlet pipe butany back pressure of gas or water in the outlet pipe will seek the valve and to the basin.

In manufacture, the seat-ring 1 9 is usually formed of brass to provide a noncorrosive seat, and an accurate fit between the valve and the seat. To permit the valve and ring to be insertedin the outlet pipe,

the "innerportion ofthe latter is'enlarged as at 22 and 'formedwith an opening 23 through which the connected valve and ring maybe inserted or removed. Said opening is normallyclosed by a cap-plate 28. The outer end of the outlet pipe 16 is adapted for connection to a sewer-pipe or pipe lead- The outlet pipe 16 has usually connected thereto a vent-pipe 24 as shown. As a result. of the construction thus far defined, a large body of liquid will be contained in the basin and the pipe/'14 below the check-valve to form an effective water-seal for preventing gases from'the sewer from basin.

In practice, when the drain is infreprevent passage thereof flowing backwardly through the 'ing into said pipe or basin. collecting receptacle 25 is disposed in the basin and removably held therein. This rebody of water as to render unlikely suiticient evaporation to permit gases to flow backwardly through thebasin. By providing a deep cylindrical body for the basin and integral trap-passage or pipe 14 at one side thereof, it becomes possible to have a large body of liquid for the seal which will i not entirely evaporate for a verylong petrap-pipe. In lieu of this construction, how-' ever, the present invention utilizes a cylindrical basin much greater in area than the trap-pipe and a vertically or upwardly extendin'gpassage at the side of the basin. The use of this basin and trap-pipeis made possibly by preventing the passage of lint or other material likely to accumulate in the trap-pipe, or in the back-water valve pass- A sedimentceptacle comprises a cylindricalbody 26 a closed bottom 27 ,1 and anoutwardly flaring emouth or flange 28 at its top, the upper portion of the body having formed therein ports orfpassagejs 29 forpe'rrnitting the drain to pass from the receptacle to the basin. The outer edge of flange'28 rests; on a seat 30 formed in the wall of the basin and the flange directs the drain into the receptacle. The diameter of the body of the receptacle is smaller than the body of the basin to leave a chamber between the receptacle and the basin for the passage oi the drain from the receptacle to thebottom of the basin, so that the drain will flow out of the basin through the pipe 14. A baflie 31 overlies the chamber in the receptacle 25 and isprovided with legs 32 resting on the upper portion of the receptacle to'hold the baflle in separated relation from the flange 28. This baffiedirects-the drain onto the flared mouth or flange 28 of the receptacle so that it will pass into the receptacle around the sides thereof and'preventit from flushing out the sediment deposited in the receptacle. The receptacle 25 is thus removably held in the basin and maybe withdrawn through the top of the basin whenever sufficient sediment has accumulated to render cleansing desirable or necessary. A rod 33 serves as a handle whereby the receptacle may be lifted out of the basin. Arms or lugs 34 extend outwardly and downwardly from the bottom of the receptacle 25 to catch any material which may escape into the basin so that it will not pass into the trap-pipe 14 or clog the opening 15. The outer ends of the arms are connected by an annulus 35 and the latter and said arms are formed integral with the receptacle so that when the latter is lifted out of the basin the solid matter arrested by the arms and ring will be withdrawn from the basin.

The operation oi the trap thus far defined will be as follows: Drainage usually carrying solids in suspension passing into the upper end ofthe basin will bedirected initially into the receptacle by the inclined flange 28. The solids and matter likely to obstruct the trap-pipe or become lodged on the back-water valve will settle in the receptacle 25 and be collected'thereby, while the liquid will pass through passages 29. to the chamber between the receptacle and the cylindrical wall of the basin. From the bottom of the basin the liquid will pass upwardly through the trap-pipe 14, back water valve 17 to the outletpipe 16, a large body of liquidremaining in the basin receptacle and trap-pipeto formaliquid seal for preventing the return of gas from the sewer as shown in Fig. 2. The back-water valve 17 being normally seated, will prevent water from being forced backwardly through the outlet pipe to the trap-pipe or basin. Resultantly, slimy matter, lint, etc., and all solids likely to obstruct the liquid passages in the basin and trap-pipe, will be retained in the receptacle. The arms or lugs 34 further obstruct the passage of such matter to the trap-pipe 14 in event they should pass through the passages 29 in the receptacle.

disturbing the connections for the trap or floor in which it is laid when access to the outlet pipe or valve 17 is desired.

In many instancesit is desired to use the drain-trap for carryingofl drain from pipes "connected to lavatories or tanks or other.

receptacles. To adapt the drain-trap to receive drainage from such pipes, a bonnet 39 is secured to thetop of the basin bvscrews 40 passing through an inturned flange 41 on'the bottom of the bonnet. The top of the bonnet is closed by a cap-plate41" which is removably held on the bonnet by clamp-screws 42 which are pivoted as at 43 to lugs on the outer side of the bonnet and are providedwith nuts 44 for clamping the capon the top of the bonnet to provide an air-tight closure for the bonnet. A

gasket 45 is usually interposed between said plate and the bonnet. Thus, Whenever it may be desired to Withdraw the sediment holding receptacle 25 from the basin, the cap-plate 41 may be removed to permit it to be lifted out of the basin and out of the bonnet without disturbing the drain-pipes connected to the bonnet, Openings 46 and 47 are provided at opposite sides of the bonnet so that a vent-pipe 48 may be connected to either side of the bonnet according to the location of the bonnet with respect to the" vent-pipe while the opening which is not in use for a vent-pipe may be closed by a plug 48 If desired both openings 46 and 47 may be used at the same time to cause a more effective ventilation or circulation of air over the inlet side of the liquid seal. The bonnet is also provided with means for connecting a drain-pipe to both or either of the sides thgreof, such as a screw-threaded opening 50 adapted to receive a drain-pipe 51 or a short pipe 52 adapted to receive the flanged terminal of a drain-pipe, such construction being well understood in the art. Each opening in the bonnet for a drain-pipe is normally closed by a check-valve 53 adapted to permit liquid to pass into the bonnet through the drainpipes and prevent back-flow through said pipe. Each of said valves is preferably inclined so that it will be held against its seat by gravity and is pivoted as at 54 to a seat-ring 55 secured against the inner face of the Wall of the bonnet; The seats are secured to the Wall of the bonnet by screws 56. Resultantly, back-flpw of water or gas through either of the drain-pipes is avoided. Furthermore, when the bonnet is connected to a plurality of drain-pipes, the drain will be, discharged into the bonnet without permitting any thereof to pass into the other pipe which is closed against backfiow by a check-valve 53.

Thus the invention provides a drain-pipe in which provision is made for preventing the trap or back-Water valves from becoming clogged or inoperative by slime or lint, etc., and which in lieu of passing through the trap-pipe is collected in the removable receptacle in the basin and this'receptacle can be removed and periodically cleansed. Furthermore, the improved drain-trap is adapted to be employed either as a floor drain or to receive drainage from drainpipes leading to lavatories or sinks or other receptacles. When used either as a floordrain or a drain-trap for drainage discharged into the trap from pipes, the sediment-holding receptacle may be readily and quickly withdrawn for cleansing whenever necessary.

The invention provides a drain-trap in which provision is made for the circulation of air in the receiving-basin and this constitutes an important feature of the invention, particularly when applied to a drain for a garage. Many explosions have occurred from the ignition of gases forming .in the drain-trap where gasolene is used,

which causes the formation of combustible vapor in the trap. By providing ventilation at the inlet side of the liquid-seal, the gasolene, which passes to the drain-and is of less specific gravity than water, and

floats on top of the seal, will evaporate and be carried off through the vent-pipe or pipes and therefore, prevent explosions. i

The invention is not to be understood as restricted to the details of construction set forth since these may be modified Within and the basin-wall for the passagerof liquid from the receptacle to the basin, outwardly extending lugs on said receptacle for arresting solid matter and removable with the receptacle, said lugs being disposed above the bottom of the basin, and a trap-pipe leading from the basin. a

. 2. Ina drain-trap, the combination of a basin having an opening in-its top, a perforated sediment-collecting receptacle having an inclined flange at its top for directing the drain into said receptacle and fitting in the top opening of the basin, outwardly extending lugs on the receptacle near the bottom thereof, a ring connecting the lower 7 ends of'said lugs, and a trap-pipe connected to said basin, a chamber being formed between the receptacle and the basin-wall for the passage of drainage to the drain-pipe.

. GEORGE J. DEHN.

Witnesses:

FRED GERLAoi-I, LEONE E. RUSSELL.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents,

Washington, 13. 0. 

